An optical lampshade is capable of decreasing noise of optical reflection includes a first transparent component, a second transparent component and an opaque component. An opening is formed on the first transparent component. An accommodating space is located inside the first transparent component. The first transparent component includes a first interior surface and a first exterior surface. The second transparent component is assembled with the first transparent component via the opening. The opaque component is disposed between the first transparent component and the second transparent component. The opaque component stretches from the first exterior surface to the first interior surface, and is suspended inside the accommodating space of the first transparent component.